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[Fix] (MG_Impl/GLImpl): record a GL error from the unimplemented compressed texture entry points instead of throwing - a C++ exception unwinding through the C GL ABI hard-crashes any caller, and glGetCompressedTexImage reported success while writing nothing

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swung0x48
2026-07-20 21:02:53 -04:00
parent 520c2b6750
commit b5a4e7075a
1 changed files with 33 additions and 13 deletions
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MobileGL/MG_Impl/GLImpl/Texture/GL_Texture.cpp
+33 -13
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@@ -456,6 +456,17 @@ namespace MobileGL::MG_Impl::GLImpl {
textureMipmapObject->AllocateStorage(textureUploadTarget, 0, {{width, height, depth}, 0});
textureMipmapObject->MarkStorageDirty(textureUploadTarget, 0, false);
}
// Compressed texture upload is not implemented yet. GL_NUM_COMPRESSED_TEXTURE_FORMATS
// reports 0, so every compressed internalformat is by definition unsupported and
// GL_INVALID_ENUM is the specified error - unlike THROW_UNIMPL_EXCEPTION, which unwinds
// a C++ exception through the C GL ABI and takes the process down.
void RecordUnsupportedCompressedFormat(const char* caller) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
"Compressed texture formats are not supported."));
}
} // namespace
const SharedPtr<MG_State::GLState::ITextureObject>& GetTextureObjectByName(GLuint texture, const char* caller) {
@@ -2594,7 +2605,13 @@ namespace MobileGL::MG_Impl::GLImpl {
}
void GetCompressedTexImage_State(GLenum target, GLint level, void* img) {
// TODO: implement
// TODO: implement compressed readback. Reporting success while writing nothing hands
// the caller stale memory with GL_NO_ERROR; no texture can be compressed yet, and GL
// specifies GL_INVALID_OPERATION when the bound level is not compressed.
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"Texture level is not stored in a compressed format."));
}
void GenTextures_State(GLsizei n, GLuint* textures) {
@@ -2781,20 +2798,20 @@ namespace MobileGL::MG_Impl::GLImpl {
void CompressedTexSubImage3D_State(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize,
const void* data) {
// TODO: implement
THROW_UNIMPL_EXCEPTION;
// TODO: implement compressed upload - see CompressedTexImage2D_State.
RecordUnsupportedCompressedFormat(__func__);
}
void CompressedTexSubImage2D_State(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
GLsizei height, GLenum format, GLsizei imageSize, const void* data) {
// TODO: implement
THROW_UNIMPL_EXCEPTION;
// TODO: implement compressed upload - see CompressedTexImage2D_State.
RecordUnsupportedCompressedFormat(__func__);
}
void CompressedTexSubImage1D_State(GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format,
GLsizei imageSize, const void* data) {
// TODO: implement
THROW_UNIMPL_EXCEPTION;
// TODO: implement compressed upload - see CompressedTexImage2D_State.
RecordUnsupportedCompressedFormat(__func__);
}
void CompressedTexImage3D_State(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height,
@@ -2804,8 +2821,8 @@ namespace MobileGL::MG_Impl::GLImpl {
auto& textureObject = GetTextureObjectByTarget(textureUploadTarget, textureTarget);
if (!ValidateTextureMutable(textureObject, __func__)) return;
// TODO: implement
THROW_UNIMPL_EXCEPTION;
// TODO: implement compressed upload - see CompressedTexImage2D_State.
RecordUnsupportedCompressedFormat(__func__);
}
void CompressedTexImage2D_State(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height,
@@ -2815,8 +2832,11 @@ namespace MobileGL::MG_Impl::GLImpl {
auto& textureObject = GetTextureObjectByTarget(textureUploadTarget, textureTarget);
if (!ValidateTextureMutable(textureObject, __func__)) return;
// TODO: implement
THROW_UNIMPL_EXCEPTION;
// TODO: implement compressed upload. Until then report the spec error for an
// unsupported compressed format rather than throwing - a C++ exception unwinding
// through the C GL ABI is a hard crash for the caller, while GL_INVALID_ENUM is
// exactly what GL_NUM_COMPRESSED_TEXTURE_FORMATS == 0 promises.
RecordUnsupportedCompressedFormat(__func__);
}
void CompressedTexImage1D_State(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border,
@@ -2826,8 +2846,8 @@ namespace MobileGL::MG_Impl::GLImpl {
auto& textureObject = GetTextureObjectByTarget(textureUploadTarget, textureTarget);
if (!ValidateTextureMutable(textureObject, __func__)) return;
// TODO: implement
THROW_UNIMPL_EXCEPTION;
// TODO: implement compressed upload - see CompressedTexImage2D_State.
RecordUnsupportedCompressedFormat(__func__);
}
void BindTexture_State(GLenum target, GLuint texture) {